获取字符串16进制MD5值（32位）

HexMD5.java

    /**
     * 16进制MD5值
     * @param message
     * @return
     * @throws Exception
     */
    private String hexdigest(String message) throws Exception {
        String hd;
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(message.getBytes());
        BigInteger hash = new BigInteger(1, md5.digest());
        hd = hash.toString(16);
        while (hd.length() < 32) {
            hd = "0" + hd;
        }
        return hd;
    }